CAT 583-8702 BEARING-SLV-GD

CAT 583-8702 GD is a Caterpillar GD series self-lubricating straight sleeve bearing (shoulder sleeve), suitable for hydraulic cylinder lugs and connecting rod hinges in equipment such as 336D2L/349D2 excavators and 980M/966M loaders. It is used for medium and heavy load, oscillating/low-speed rotation conditions, providing stable support and reducing journal wear. It is often used in conjunction with 364-9897 sleeve and 477-2023 bearing cap Cat® Parts. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 583-8702 GD (straight sleeve bearing), material is steel back + tin bronze ZCuSn10Pb10 inner liner (oil-containing self-lubricating, hardness HB85-95, wear-resistant and impact-resistant), surface graphite inlay (friction coefficient 0.08-0.12), operating temperature -40℃ to +120℃, single weight approximately 1.2 kg, suitable for medium and heavy loads, oscillating/low-speed rotation conditions, used in hydraulic cylinder lugs, connecting rod hinge points, reducing journal wear and guiding lubrication, ensuring smooth rotation

Key Dimensions
Inner diameter 80 mm (tolerance 0/-0.015 mm), outer diameter 100 mm (tolerance +0.015/0 mm), total length 50 mm, wall thickness 10 mm, inner hole surface roughness Ra≤0.4 μm, mating tolerance inner ring H6 (0/-0.015 mm), outer ring H7 (+0.030/0 mm), journal fillet radius ≤1.0 mm, coaxiality ≤0.02 mm. Compatible models: Cat 336D2L/349D2 excavators (boom cylinder lug end), 980M loaders (bucket cylinder piston rod end), D8T bulldozers (bottom hinge point of the pusher cylinder), 966M loaders (upper hinge point of the boom cylinder). Matching 364-9897 sleeves and 477-2023 bearing caps using Cat® Parts. Assembly fit: Inner bore and journal transition fit (clearance 0.005-0.020 mm), outer ring and bearing housing interference fit (interference 0.008-0.015 mm). Compatible with 80 mm… For diameter shafts, the journal needs to be heat-treated (HB220-250) and ground (Ra≤0.8 μm), and the bearing housing bore needs to be bored (Ra≤1.6 μm).

Installation and Maintenance Points: Before installation, clean the inner and outer surfaces of the bearing, the journal, and the bearing housing bore. Check for scratches, porosity, and cracks. Measure the dimensions of the journal and outer ring bore to ensure the fit meets requirements. The journal fillet radius should be ≤1.0 mm to avoid stress concentration.

Use the cold-press installation method, using a special press to press the bearing into the bearing housing. Do not directly strike the end face to prevent deformation. After installation, check for axial movement ≤0.05 mm to ensure there is no jamming.

Lubrication and Maintenance: Before assembly, apply Cat Moly Grease (filling amount: 20-30% of the bearing’s internal space). Check for wear every 500 hours. If the inner bore wear exceeds 0.15 mm or scoring occurs, replace immediately. It is recommended to replace it simultaneously with the sleeve and bearing cap.